How to make it

Put 16 muffin paper cases in a muffin pan. Put the butter, sugar, and peanut butter in a bowl and beat togeter for 1-2 minutes or until well mixed. Gradually add the eggs, beating well after each addition, then add the vanilla. Sift in the flour and baking powder and then, using a metal spoon, fold them into the mixture, alternating with the milk. Carefully fold in the chocolate chips. Spoon the batter into the paper cases. Bake in preheated oven at 350 degrees for 25 minutes, or until well risen and golden brown. Transfer to a wire rack and let cool.

To make the frosting, put the cream cheese and butter in a large bowl and, using a electric whisk, beat together until smooth. Sift the confectioners' sugar into the mixture, then beat together until well mixed. When the cupcakes are cold, spread teh frosting on top of each cupcake, swirling it with a round-bladed knife. Sprinkle the top with additional mini chocolate chips. Store the cupcakes in the refrigerator